KR100952637B1 - Tooling Hole bush for Fixing Position - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tooling hole bush for position fixing, and more particularly to a tooling hole bushing for position fixing, which is formed in a lay-up mold shell for inserting a position fixing pin of a production part during a vacuum forming process. The tooling hole bush is formed of a stainless steel cylinder having a fixing pin insertion hole for inserting a position fixing pin in the center of the upper end thereof so that the upper end of the cylinder body can be inserted into the layup mold shell to be extended An O-ring mounting groove is formed along the outer circumference of the first step portion, a second step portion is formed below the O-ring mounting groove, and a male screw portion is formed below the second step portion. A body portion; An O-ring formed of a soft ring-shaped body and seated in an O-ring seating groove formed in the body portion; A plurality of nuts fastened to male threads formed on the body; And a plurality of washers inserted between the nut and the second step portion.

According to the present invention, in the vacuum molding process for manufacturing a composite part, it is possible to form a highly functional tooling hole bushing for positioning by screwing only on a layup mold shell without a welding part, 1 nut and the second nut take the place of the conventional welding plate, the problems such as deformation and pressure leakage caused by the plate welding portion of the layup mold shell in the conventional vacuum forming process are eliminated, And the airtightness thereof can be improved.

Hole, Bush, Lay-up Mold

Description

{Tooling Hole bush for Fixing Position}             

1 is a sectional view showing the shape of a tooling hole bush for position fixing formed in a conventional layup mold shell,

FIG. 2 is an exploded perspective view showing the shape of each component of the tooling hole bush for position fixing according to the preferred embodiment of the present invention,

3 is a perspective view showing the shape of a tooling hole bushing for fixing a component to which the components shown in Fig. 2 are coupled,

4 is a cross-sectional perspective view showing a shape in which the tooling hole bush for position fixing shown in Figs. 2 and 3 is installed in the layup mold shell.

Description of the Related Art [0002]

1: lay up mold shell

100: Body part

110: First step

120: O ring seating groove

130: Second step

140:                 

150: Position fixing pin insertion hole

200: O ring

300: 1st washer

400: Second washer

500: First nut

600: Second nut

The present invention relates to a high-performance position fixing tooling hole bush (not shown) formed on a lay-up mold shell without a welding part in a vacuum forming process for manufacturing a composite part. Bush).

Generally, a plurality of composite components are included in an aircraft, a ship, an automobile, etc. In order to produce such a composite part, a vacuum molding process for performing a predetermined molding process in a vacuum state is required.

Generally, such a vacuum forming process is performed by hand laying up a product according to a given mold, curing it by applying vacuum pressure and high temperature through a molding device such as an auto-Clave device, .

Lay-up mold is a tool that is used in the above-described vacuum forming process, and is a device for laying up the position of the product in the autoclave device.

This lay-up mold requires tight frontal sealing to support the vacuum pressure in the autoclave and also allows the lay-up of the lay-up mold to achieve a uniform temperature transfer and rapid temperature rise during pressure and heat curing in the autoclave. The shell should be as thin as possible and of a constant thickness.

The layup mold shell is provided with a plurality of position fixing tooling holes so as to be able to insert and fix pins between the product and the layup mold shell in order to accurately fix the product to the required position in the process, A bush is formed.

 1 is a sectional view showing the shape of a tooling hole bush for position fixing formed in a conventional layup mold shell.

As shown, the conventional tooling hole bush for position fixing is formed by welding a plate 2 of a sufficient thickness locally to a layup mold shell 1 formed of a thin thin plate, attaching a drill and a reamer thereto To form a hole 3, and then a general drill bush is inserted into the hole 3.

However, since the conventional tooling hole bushing for position fixing has a welded portion as described above, if a high temperature and a high pressure are applied during the process, deformation occurs at the welded portion to degrade the positional accuracy of the hole, There is a possibility of causing serious problems such as pressure leakage due to defects.

Therefore, the shape or characteristics of the produced parts are deformed to increase the probability of occurrence of defective products, as well as frequent maintenance of holes, which ultimately leads to a problem of deteriorating the efficiency of product production.

SUMMARY OF THE INVENTION The present invention has been made in order to solve these problems, and it is an object of the present invention to provide a position fixing tooling hole bush which is formed only by screwing, And it is an object of the present invention to improve the accuracy of the hole position and the airtightness thereof.

In order to achieve the above object, the present invention provides a position fixing tooling hole bushing formed in a layup mold shell for inserting a position fixing pin of a manufactured part in a vacuum forming step, A first stepped portion is formed on the upper end of the cylindrical body so as to be inserted into the layup mold shell and an outer peripheral surface is formed at a lower portion of the first stepped portion, An O-ring mounting groove is formed in the O-ring mounting groove, a second step portion is formed in a lower portion of the O-ring mounting groove, and a male screw portion is formed in a lower portion of the second step portion; An O-ring formed as a ring-shaped body of a high-temperature rubber material and seated in an O-ring seating groove formed in the body portion; A plurality of nuts fastened to male threads formed on the body; And a plurality of washers inserted between the nut and the second step.

At this time, it is preferable that the above-mentioned plurality of nuts use two nuts, that is, a first nut and a second nut, and a plurality of washers use two washers, i.e., a first washer and a second washer.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, so that those skilled in the art can easily carry out the present invention.

In the drawings, like reference numerals denote like elements throughout the drawings, wherein like reference numerals are given to like elements although they are shown in different drawings.

FIG. 2 is an exploded perspective view showing the shape of each component of the tooling hole bushing for position fixing according to the preferred embodiment of the present invention, and FIG. 3 is a perspective view showing a combined shape of the components shown in FIG.

2, the tooling hole bush for position fixing according to the preferred embodiment of the present invention includes a body 100, an O-ring 200, a first washer 300, a second washer 400, 1 nut (500) and a second nut (600).

The body part 100 is formed of a cylindrical stainless steel material having a fixing pin insertion hole 150 formed at the center of the upper part. The upper part of the cylindrical body is inserted into the layup mold shell, An O-ring seating groove 120 is formed in the lower portion of the first step portion 110 along the outer circumferential surface so that the O-ring 200 can be seated.

A second step 130 is formed in the lower part of the O-ring seating groove 120. The lower part of the second step 130 is engaged with the first nut 500 and the second nut 600 A male screw portion 140 is formed.

Preferably, the upper end of the fixing pin insertion hole 150 is formed in a hexagonal shape so as to facilitate insertion of the fastening tool when fastening the first nut 500 and the second nut 600, And is formed in a circular shape to facilitate insertion of the pin.

The O-ring 200 is formed as a ring-shaped body made of a rubber material for high temperature and is inserted and seated in the O-ring seating groove 120 of the body 100 as shown in FIG. 3. When installed, the O-ring 200 is pressed on one side of the lay- And the like.

The first nut 500 and the second nut 600 are fastened to the male screw part 140 of the body part 100 to fix the body part 100 to the layup mold shell.

At this time, a first washer 300 and a second washer 400 are inserted between the first nut 500 and the second step 130, so that the male thread 140 of the body 100 and the first By tightening the fastening between the nut 500 and the second nut 600, the body part 100 can be securely fixed to the lay-up mold shell.

Fig. 4 is a cross-sectional perspective view showing a shape in which the position fixing tooling hole bushing shown in Figs. 2 and 3 is installed in the layup mold shell 1. In order to install the position fixing tooling hole bush, 1, a through hole for inserting a tooling hole bushing is to be formed, and a tooling hole bushing for position fixing is to be inserted into the through hole.                     

4, the first stepped portion 110 formed on the body 100 extends over the stepped portion formed in the bush insertion hole of the layup mold shell 1, It can be seen that the O-ring 200 seated in the seating groove 120 is closely attached to the side surface of the through-hole for bush insertion, thereby enhancing airtightness.

The first nut 500 and the second nut 600 are fastened to the male screw portion 140 of the body 100 and the first nut 500 is fastened between the first nut 500 and the second step portion 130, It is understood that the position of the hole bush is not deformed even if a high pressure is generated in the process by fixing the nut 300 and the second washer 400 to secure the fastening of the nuts 500 and 600.

By inserting the position fixing pin for fixing the manufactured product into the fixing pin insertion hole 150 formed at the center of the upper end of the body part 100 when the tooling hole bush for position fixing is installed, It is possible to fix the product accurately so that the positional deformation does not occur.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the exemplary embodiments are defined by the appended claims rather than by the foregoing description. It will be understood that various modifications and changes may be made without departing from the spirit and scope of the invention.

Particularly, in the above-described embodiment, the two washers 300 and 400 and the nuts 500 and 600 are fastened to the male threaded portion 140 of the body 100, respectively. However, depending on the strength of the pressure applied during the process It is also possible to use a larger number of washers and nuts.

Accordingly, modifications of the embodiments of the present invention will not depart from the scope of the present invention.

As described above, according to the present invention, it is possible to form a highly functional position-fixing tooling hole bush by screwing only on a layup mold shell without a welding portion in a vacuum forming process for manufacturing a composite part, The first nut and the second nut coupled to the first plate and the second plate serve as a conventional welding plate, thereby eliminating the problems such as deformation and pressure leakage caused by plate welding of the lay-up mold shell in the conventional vacuum forming process, The accuracy of the hole position and the airtightness thereof can be improved.

Claims (3)

In a tooling hole bush for position fixing formed in a lay-up mold shell for inserting a position fixing pin of a manufactured part in a vacuum forming step, And a fixing pin insertion hole (150) for inserting the position fixing pin is formed in a central portion of the upper portion of the cylinder, and an upper end of the cylindrical body is inserted into the layup mold shell An O-ring seating groove 120 is formed along the outer peripheral surface of the lower portion of the first step portion 110 and a lower portion of the O-ring seating groove 120 is formed below the O- A body portion 100 having a stepped portion 130 and a male threaded portion 140 formed under the second stepped portion 130; An O-ring 200 formed of a ring-shaped body of high temperature rubber material and seated in the O-ring seating groove 120 formed in the body 100; A plurality of nuts (500, 600) fastened to the male screw part (140) formed on the body part (100); And a plurality of washers (300, 400) inserted between the nuts (500, 600) and the second stepped portion (130). The fixing pin insertion hole (150) according to claim 1, wherein an upper end of the fixing pin insertion hole (150) is formed in a hexagonal shape so that a tool can be inserted at the time of fastening the nut (500, 600) Wherein the tool holding hole is formed in a circular shape. 2. The tooling hole bushing according to claim 1, wherein the plurality of nuts (500, 600) and the washers (300, 400) are fastened and inserted by two, respectively.

Images